No condensors or contact cleaner please. Usually all that is required is a good cleaning. A flex stone will work for most, a point file does the trick on the tungsten contacts. A blue spark is normal but if it's excessive it could be a sign of dirty contacts or another issue.

That Hayburners glass looks very appropriate in the machine. If you hadn't mentioned it I wouldn't have noticed it being out of place.

The earlier games had metal flipper links with brass coil sleeves.